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California contractor license

Ozone HVAC

Ozone HVAC of San Jose holds California license 1128892 (C10 Electrical, C20 Warm-Air Heating, Ventilating and Air-Conditioning). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Nov 30, 2028.

Doing business as Ozone Service.

Active

  • Workers' comp ends Nov 7, 2026 (9 days)

Ozone HVAC, San Jose

License
1128892
Class
C10 Electrical; C20 Warm-Air Heating, Ventilating and Air-Conditioning
Expires
Nov 30, 2028
Bond
$25,000
Workers' comp
Insured to Nov 7, 2026

CSLB file dated Oct 29, 2026

From the CSLB file dated Oct 29, 2026. Not a consumer report; check the board before you hire.

What bond, insurance and workers' comp are on file?

Bond
$25,000North River Insurance Company (The), from Sep 13, 2024, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredValley Forge Insurance Company, from Nov 7, 2025, to Nov 7, 2026

Who is on this license?

Officer
Konstantin BychkovSince Nov 8, 2024
Responsible managing officer, CEO and president
Alexander DorofeevSince Nov 8, 2024

What work does this license cover?

Issued Nov 8, 2024.

Which other San Jose businesses hold C10 Electrical?

Electrical Contractors in San JoseCalifornia electrical contractorsHVAC Contractors in San JoseCalifornia HVAC contractors

What should you check before hiring?

What to ask before you hire

  1. Ask whether it has been renewed. Something on this license ends within 60 days. Check again before you pay a deposit.
  2. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  3. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  4. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  5. Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
  6. Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 29, 2026)
  2. Contractors State License Board (CSLB)